#!/usr/bin/node
const fs = require('fs');

switch(process.argv.length){
  case 4:{     //hard link node 13-ln.js src lnk
    let src = process.argv[2],
        lnk = process.argv[3];
    fs.linkSync(src,lnk);
    break;
  }
  case 5:{// soft link node 13-ln.js -s src lnk
    let src = process.argv[3],
        lnk = process.argv[4];
    fs.symlinkSync(src,lnk);
    break;
  } 

  default:
  
    console.error('命令行参数数不正确');
    process.exit(1);
}


